International Journal of Computer Science & Engineering Technology (IJCSET)
Information Technology always needs a way to increase capacity or add capabilities without investing in new infrastructure, training new personnel, or licensing new software. Cloud computing encompasses any subscription-based or pay-per-use service that, in real time over the Internet, extends IT's existing capabilities. Cloud computing is at an early stage, with a diverse group of providers large and small delivering cloud-based services, from full-blown applications to storage services to spam filtering. Today, for the most part, IT must plug into cloud-based services individually, but cloud computing aggregators and integrators are already emerging.